[Asterisk-Users] Re: Help with strategy for echo cancellation.

[Bruce Komito]

Probably the reason you get echo on the Voicepulse calls is because the
propogation delay between the IP phone and where the call becomes analog
is much greater than over your FXO lines.

Bruce Komito
High Sierra Networks, Inc.
www.servers-r-us.com
(775) 236-5815


On Thu, 23 Sep 2004, Shilliday, Jim wrote:

> All this is consistent with Cisco's analysis -- you can have echo
> without analog ports IF there's an analog circuit at the other end of
> the call (and there usually is).  We're getting echo on outgoing calls
> through VoicePulse, not on the FXO's that only carry incoming traffic.
>
> Jim Shilliday
> IT Director
> Equal Justice Center
> 1315 Walnut St. Suite 400
> Philadelphia PA 19107
> 215-238-6970
>
>
> -----Original Message-----
> From: Bruce Komito [mailto:brucek at bagel.com]
> Sent: Thursday, September 23, 2004 11:21 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Re: Help with strategy for echo
> cancellation.
>
> Not true, in my experience.  We have no analog lines (i.e., no FXO
> ports),
> only PRIs, and we have consistent echo problems.
>
> Bruce Komito
> High Sierra Networks, Inc.
> www.servers-r-us.com
> (775) 236-5815
>
>
> On Thu, 23 Sep 2004, David Cook wrote:
>
> > I'd like a good plan for this too, however this problem seems to exist
> > only with analog FXO interfaces. If you have 12 lines, would it not
> > have been cost effective to go fractional T1 then the box would be
> > cleaner and the problem be averted?
> >
> > Quoting asterisk-users-request at lists.digium.com:
> > > I have just installed * (RH9, P4 3.0GHZ, 1G RAM) in a small office,
> > > using three TDM400's with 4 FXO's each for incoming calls.  Outgoing
> > > calls are (for the moment) routed via VoicePulse.
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